Air-damper release for furnaces.



S. B. REMINGTON. v AIR DAMPER RELEASE FOR FURNACES. APPLICATION FILEDn30.11,1912.

1,1 10,577, Patented Sept. 15, 1914.

ll 6 Y l -I w= 7 1 J43 i I WIN/w INVENTOR I v AMUEL B.REMINGTON.

ATTORNEY THE NORRIS PETERS (E04, PHOTOYLITHOH WASHINGTUN. D. C.

SAMUEL B. REMINGTON, OF'ADRIAN, MICHIGAN.

AIR-DAMPER RELEASE FOR FURNACES.

Specification of Letters Patent.

Patented Sept. 15, 1914.

Application filed December 11, 1912. Serial No. 736,058.

To all whom it may concern 7 Be it known that I, SAMUEL B. REMING- TON,a citizen of the United States, residing at Adrian, in the county ofLenawee, State of l/iichigan, have invented certain new and usefulImprovements in Air-Damper Re lease for Furnaces; and I do declare thefollowing to be a full, clear, and exact descrip tion of the invention,such as will enable others skilled in the art to which'it apper tains tomake and use the same, reference being had to the accompanying drawings,and to the characters of reference marked thereon, which form a part ofthis specification.

This invention relates to an air damper release for furnaces of thesteam boiler type,

and consists in the constructlon and arture illustrated in theaccompanying drawings, in which:

Figure 1 is a general View showing the application of my invention to asteam heater of the Gurney type. Fig. 2 is a front elevation of theadjustable automatic release. Fig. 3 is a vertical section as on line3-3 V of Fig. 2. Fig. 4 is a perspective view of the pivotally mountedspring restrained detent to which the chain of the air damper is adaptedto be connected.

Referring to the drawings by the characters of reference marked thereon,1 designates a steam heater having the usual ash door 2 in which 1slocated an air damper 3.

from the diaphragm case 6 is a bracket 8 to which a lever 9 1sfulcrume'd, as shown at 10. The bearing stem 11 passes through thediaphragm case and engages the under side of said lever. Also mountedupon the diaphragm case are guides 12 between which the leverreciprocates. lonnected atits lower end to the air damper 3 is a chain13, the upper end of which is connected to the projecting end ofthe-lever 9. Also connected'to and leading upwardly from said lever is achain 14, whoseupper end is provided with a ring 15. Located at asuitable point in the house or building, preferably upon the main floor,is a case 16. Fulcru-med at the lower end of said case,between the sidesthereof upon a transverse pin 17, is a detent 18, having an outwardlyprojecting finger 19. straight face 20 -(see- Fig. 4:),which, when theparts are in their normal position, is adapted to engage a rubber buffer21 which 1s mounted. ln'the rear wall-of the case.

Projecting from the upper portion of the detent=1s a lug 22 having aneye'23' therein. Engaging lnthe eye of said lug 1s a terminal member 24of a relatively stiff coil spring 25 which is suspended Verticallywithin the case from the hook26 of an ad justing screw 27 mounted tomove vertically through the upper end 28 of the case, and receiving onits upper end a thumb nut 29.

When there is no pressure in the steam space of the heater, or when saidpressure is low, the air damper 3 may be opened by drawing upwardly uponthe chain 14: and may be held open by engaging the ring 15 at the end ofsaid chain over the projecting finger 19 of the detent. The parts willre main in this position until the fire, which is caused to burn morebriskly by the opening of the air damper, shall have raised the pressurein the boiler to a predetermined point, or to a point suflicient toovercome theresistance of the spring 25, when the diaphragm will beactuated to cause its stem 11 to engage the lever 9 and move it 7 uponits fulcrum against the resisting action of said spring to draw thefinger 19 of the detent downwardly until the ring 15 slips therefrom,permitting the lever 9 to assume the position shown by dotted lines inFig. 1, and allowing the air damper to close. Whenever the air dampershall have been closed by the operation just described it will remainclosed until it is again opened by the manual operation of drawingupwardly on the chain 14 and engaging the ring 15 over slip from saiddetent when it shall have been drawn downwardly to the, position shownby dotted lines in Fig. 3. ,After the ring 15 slips from engagement withthe finger of the detent the retracting power of the spring will returnthe detent to its nor-- mal position with its rear face inenga'gementwith the buffer 21, said buffer serving to deaden the noise incident tothe forcible return of the detent by the spring .25. it

It will be understood that by means of the wing nut 29 the tension onthespring 25 may be so regulated as to cause an'actuation of the lever 9to automatically release the air damper whenever the pressure in the Vheater shall have reached at predetermined point. By this arrangementoverheating the building is avoided, as'the air damper willautomatically close when the boiler pressure reaches certain point, andwill remain closed until it is manually opened, thereby enabling a lowheat to be carriedwhen and as long as desired. In the back of the case16 are apertures 30. (see Fig. 3) adapted for 7 Copies .01 this patentmay be obtained for the reception of screws which may be employed forsecuring the case in position.

Having thus fully set forth my invention, what Iclaim asnew, and desireto secure by Letters Patent, is: p 1. In an automatic release for airdampers, a pressure actuated. diaphragm, a pivoted lever connected tosaid diaphragm to be actuated thereby, a pivotally mounted detent, aspring for restraining said detent,

means for varying the tension of "said sprlng, means for detachablyconnecting said detent to said lever to permit a disengagement of saidparts as the lever moves uponits pivot 111C118 dlrection, an air clam-3er and means connectin said air dam er to said lever.

2. In an automatlc release for air dampers, a pivotally mounted detent,a spring,

detachably connected to said detent, an adjusting screw in engagementwith said spring, a bufier to cushion the'recoil of the detent, apivoted lever, means fordetachably connecting said lever to said detent,a diaphragm connected to said lever to part movement thereto, a hingedair damper,

and. means connecting said. damper to'said lever.

In. testimony whereof, Issign this specification in the presence of twowitnesses.

SAMUEL B. REMINGTON.

' Witnesses: r

' FRANK Srnzs,

1 JAMES F. BURNS.

fivece'nts each, by addressing the Commissioner of Ifate'nts,Washington, D. G. I Y a

